Based on the provided data, we can observe that the coin in question has had auction prices ranging from 13 to 160 euros in previous auctions. The coin's condition has been maintained within a range of 70 (VF-) to 110 (UNC).

Given that the starting price for the upcoming auction is 40 euros and considering that the average auction price has been 45.93 euros, we could estimate a maximum purchase price around 50-55 euros. However, please note that this is just an estimate and the final price could vary depending on the demand at the auction and the interest of buyers at that specific time.